<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <div id="app">
    <div>
      <div
        style="display: inline-block"
       v-for="(number,index) in arr" :key="number.id">
        <input type="checkbox" :value="number" v-model="selectedNumbers"/>
        <span>{{ number }}</span>
      </div>
      <p>你选中的元素, 累加的值和为: {{ sumOfSelected }}</p>
    </div>
  </div>
  <script src="../vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        arr: [9, 15, 19, 25, 29, 31, 48, 57, 62, 79, 87],
        list:[],
        selectedNumbers: []
      },
      methods: {
        add01(){
            
        }
      },
      computed: {
        sumOfSelected() {
          return this.selectedNumbers.reduce((sum, number) => sum + number, 0);
        }}

    })
  </script>
</body>

</html>